Your search for "basic darkness energy - 066/s-p" revealed the following:
Basic Darkness Energy - 015 - Futuristic Rare from Mega Evolution: 30th Celebration, available at 401 Games Canada. Rarity: Futuristic Rare Finish: Holofoil Artist: YOSHIROTTEN
Basic Darkness Energy - SVE023 - Common from Scarlet & Violet Energies, available at 401 Games Canada. Rarity: Common Finish: Normal
Basic Darkness Energy - SVE015 - Common from Scarlet & Violet Energies, available at 401 Games Canada. Rarity: Common Finish: Normal
Basic Darkness Energy - MEE007 - Common from Mega Evolution Energies, available at 401 Games Canada. Rarity: Common Finish: Normal
Basic Darkness Energy - SVE007 - Common from Scarlet & Violet Energies, available at 401 Games Canada. Rarity: Common Finish: Normal
Darkness Energy (Basic) - 129/130 - Common from Diamond & Pearl (Base Set), available at 401 Games Canada. Rarity: Common Finish: Normal
Basic Darkness Energy (Japanese) - 095/066 - Ultra Rare from SV4K: Ancient Roar, available at 401 Games Canada. Rarity: Ultra Rare Finish: Holofoil Artist: Basic Darkness Energy
Basic Darkness Energy (Japanese) - 134/SM-P - Promo from SM-P: Sun & Moon Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Artist: Basic Darkness Energy
Basic Darkness Energy (Japanese) - 350/SM-P - Promo from SM-P: Sun & Moon Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Artist: Basic Darkness Energy
Basic Darkness Energy (Japanese) - 029/M-P - Promo from M-P Promotional Cards, available at 401 Games Canada. Rarity: Promo Finish: Holofoil
Basic Darkness Energy (Japanese) - 188/SM-P - Promo from SM-P: Sun & Moon Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Artist: Basic Darkness Energy
Basic Darkness Energy (Japanese) - 043/SV-P - Promo from SV-P: Scarlet & Violet Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Artist: Basic Darkness Energy
Basic Darkness Energy (Japanese) - DAR - Futuristic Rare from M6a: 30th Celebration, available at 401 Games Canada. Rarity: Futuristic Rare Finish: Holofoil Artist: YOSHIROTTEN
Basic Darkness Energy - 098/064 - Hyper Rare from Scarlet & Violet: Shrouded Fable, available at 401 Games Canada. Rarity: Hyper Rare Finish: Holofoil Artist: Basic Darkness Energy
Espeon (Japanese) - 066/SV-P - Reverse Holo Promo (Yu Nagaba) from SV-P: Scarlet & Violet Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Artist: YU NAGABA Card Text:[Psychic][Colorless][Colorless] Psybeam (80)Your opponent's Active Pokémon is now Confused.